78630628 has 12 divisors (see below), whose sum is σ = 137812780. Its totient is φ = 39255552.

The previous prime is 78630619. The next prime is 78630637. The reversal of 78630628 is 82603687.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78630619) and next prime (78630637).

It can be written as a sum of positive squares in 2 ways, for example, as 29181604 + 49449024 = 5402^2 + 7032^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11913 + ... + 17296.

Almost surely, 2^78630628 is an apocalyptic number.

It is an amenable number.

78630628 is a deficient number, since it is larger than the sum of its proper divisors (59182152).

78630628 is a wasteful number, since it uses less digits than its factorization.

78630628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29886 (or 29884 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 78630628 is about 8867.3912736498. The cubic root of 78630628 is about 428.4142566736.

The spelling of 78630628 in words is "seventy-eight million, six hundred thirty thousand, six hundred twenty-eight".